Packing.



H. J. DOOLAN. PACKING.

APPLIGATION FILED JAN. 18, 1912.

1,025S792Q Patented May 7, 1912.

- WITNESSES INVENTOR M MM W @x UNITED STATES-PATENT OFFICE.

HENRY JAMES DOOLAN, or NORFOLK, VIRGINIA.

PACKING.

Specification of Letters Patent.

Patented May 7, 1912.

Application filed January 18, 1912. Serial No. 671,961.

and

The invention has for its object to providean improved packing which maybe readily placed in position and removed when repairs are necessary;which will automatically compensate for wear; and which will effectuallymaintain a steam tight joint at all points.

The invention will be hereinafter fully set forth and particularlypointed out in the claims.

In the accompanying drawings :--Figure 1 is a horizontal sectional viewillustrating a section of my improved packing. Fig. 2 is a transversesectional view thereof. Fig. 3 is a detail view illustrating the packingmembers. Fig. 4 illustrates a slight modification.

Referring to the drawing, 10 designates a box of any suitable orpreferred contour, the form shown being circular. Said box comprises topand bottom walls 11 connected by a cylindrical side wall 12 and providedwith an internal annular chamber 13 and central openings 14: for thepassage of the piston rod or other element to which the packing isapplied. This box is constructed of suitable durable metal, preferablybronze, although I do not desire to limit myself in this particular.Located in the chamber 13 are packing members 15 preferably semicircularin form and provided with complemental. straight abutting edges 16, 17The edge 16 of each member is located on one side of the center of theare on which the curvature of the member is struck, and the other edge17 is located on the opposite side of said center. The packing members15 are held in position by means of clamping plates 18, preferably ofresilient metal provided with hook projections 19, the hook projectionsof the two members being connected by coil springs 20. Leaf springs 21may also be riveted in the box 10 and arranged to bear against saidpacking member. The outer faces of the top and bottom walls 11 arecovered with a thin layer 25 of lead or similar soft metal, whereby whentwo of the ing members located in said boxes are placed one upon theother a close contact and a tight joint is secured. The box 10, as shownis formed in two sections.

In Fig. 1 I have illustrated a slight modification which consists inproviding the box 10 with a chamber 22 in which fibrous material 23mixed with graphite or other lubricating material, may be placed, forthe purpose of lubricating the piston rod, valve stem, or other elementto be packed.

In practice the packing members are closely held incontact with thepiston rod or the like by the springs 20 and 21, said springs yieldingsufficiently to permit movement of the piston rod but at the same timemaintaining sufficient tension to provide a steam tight joint. It willbe noted that the arrangement illustrated and described is exceedinglysimple and may be readily ap plied or placed in position and may bereadily removed when repairs are necessary. The arrangement of thesprings is such that all wear is automatically taken up.

Having thus explained the nature of my invention and described anoperative manner of constructing and using the same, although withoutattempting to set forth all of the forms in which it may be made, or allof the forms of its use, what I claim is 1. A packing of the characterdescribed comprising a sectional box provided with an internal chamberand having openings in its sides, packing members located in saidchamber, clamping members also located within said chamber andsurrounding said packing members, the ends of each clamping member beingopposite the ends of the other clamping member, and resilientc0nnectingmeans exerting an equal tension on the opposed ends of said clampingmembers to maintain a uniform tension on the latter.

2. A packing of the character described comprising a box provided withan internal chamber and openings in its sides, packchamber, clampingmembers also located in said chamber and surrounding said packingmembers, said clamping members being provided with opposed hook-likeends, and coil springs of equal size connecting the opposed ends of saidclamping members to maintain a uniform tension on the latter.

8. A packing of the character described comprising a sectional boxprovided with an internal chamber and having openings in its sides,packing members located in said chamber, clamping members also locatedin said chamber and surrounding said packing members, the ends of eachclamping member being opposite the ends of the other clamping member,resilient connecting means exerting an equal tension on the opposed endsof said clamping members to maintain a uniform tension on the latter,and spring plates secured within said chamher and engaging said clampingmembers.

l. A packing of the character described comprising a box provided with apacking chamber, a lubricating chamber, and openings in its sides,lubricating material in said lubricating chamber, packing memberslocated in said packing chamber, clamping members also located in saidpacking chamher and surrounding said packing, the ends of each clampingmember being opposite the ends of the other member, and resilientconnecting means exerting an equal tension on the opposed ends of saidclamping members to maintain a uniform tension on the packing.

5. A packing of the character described comprising a box having anannular chamber and openings in its sides, a covering of soft metal forthe sides of said box, and packing means carried by said box.

In testimony whereof I have hereunto set my hand in presence of twosubscribing witnesses.

HENRY JAMES DOOLAN. lVitnesses E. E. SnEBEoK, JAs. G. BROWNLEY.

M Copies of this patent may be obtained for five cents each, byaddressing the Commissioner of Patents. Washington, D. G.

